transformer construction
DESCRIPTION
TRANSFORMER CONSTRUCTION. PRESENTED BY K.SURESH ASST . PROFESSOR. TRANSFORMER MAINLY CONSIST OF. WINDING CORE TANK INSULATIONS TRANSFORMER OIL BUSHINGS CONSERVATOR BREATHER COOLING OF TRANSFORMER BUCHHOLZ RELAY OIL LEVEL INDICATOR TEMP INDICATOR. WINDINGS. - PowerPoint PPT PresentationTRANSCRIPT
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TRANSFORMER CONSTRUCTION
PRESENTED BY
K.SURESHASST . PROFESSOR
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TRANSFORMER MAINLY CONSIST OF
•WINDING•CORE•TANK•INSULATIONS•TRANSFORMER OIL•BUSHINGS•CONSERVATOR•BREATHER•COOLING OF TRANSFORMER•BUCHHOLZ RELAY•OIL LEVEL INDICATOR•TEMP INDICATOR
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WINDINGS• Types of
transformer windings are,• CONCENTRIC• SANDWICH
• Disc• Cross over• Helical
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CONCENTRIC
COIL
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SANDWICH
COIL
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TYPES OF SANDWICHED COILS
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CORE
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TYPES OF CORE
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TANKMADE OF•STEEL AND ALUMINIUM(power and traction transformers)• MILD STEEL AND ALUMINUM(BESIDE power and traction transformers)
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INSULATIONS
Dry type Transformers:VarnishEnamelLarge size Transformers:Unimpregnated paperCloths
Immersed in Transformer oil – insulation & coolent
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TRANSFORMER OILTRANSFORMER OIL SHOULD HAVE
•INSULATING PROPERTY•VISCOSITY•PURITY•SLUDGE FORMATION•ACIDITY•HIGH FLASH POINT AND FIRE POINT
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BUSHINGS
BUSHINGS CONSIST OF
• INSULATOR• ROD
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CONSERVATOR
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BREATHER
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COOLING OF TRANSFORMERS
Methods of cooling:1. Air Natural (AN)-upto 1.5MVA2. Air Blast (AB) 3. Oil natural (ON) – Upto 10 MVA4. Oil Natural – Air Forced (ONAF)5. Oil Forced– Air Natural (OFAN) – 30 MVA6. Oil Forced– Air Forced (OFAF)7. Oil Natural – Water Forced (ONWF) –
Power plants8. Oil Forced - Water Forced (OFWF) – Power
plants
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BUCHHOLZ RELAY
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OIL LEVEL INDICATOR
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TEMP INDICATOR
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THREE PHASE TRANSFRMERS
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THREE PHASE TRANSFRMERS(1)
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THREE PHASE TRANSFRMERS(2)
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HISTORY OF TRANSFORMER1885
William Stanley's First Transformer built in 1885
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1885
• William Stanley's First Transformer built in 1885
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1885
• Shell form transformer. Sketch used by Uppenborn to describe ZBD engineers' 1885 patents and earliest articles.
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1886
• Stanley's first transformer which was used in the electrification of Great Barrington, Massachusetts in 1886
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1891
• Transformer used on the Lauffen to Frankfurt demonstration line.
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1891
• Early three phase transformer (circular core type)Siemens and Halske company5.7 kVA 1000/100 V
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1895
• 1895 Air cooled transformers built by William Stanley for a three phase AC power station
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1917
• Large Westinghouse transformers from 1917 at the Hydro-power plant at Folsom, California